What helps your bones and joints to walk, run, dance, and jump? Muscles! Muscles pull your bones to move your body. Muscles in your legs help you to ride a bicycle. Muscles in your arms help you to row a boat.
There are more than 600 muscles in your body!
Running, swimming, dancing, and riding a bicycle are types of exercise. Exercise makes your muscles, bones, and joints strong. Your heart is a type of muscle. Exercise makes your heart strong, too.
Protect your body! Do exercise every day. What is your favorite type of exercise?